mirror of https://github.com/rust-lang/rust
36 lines
837 B
Rust
36 lines
837 B
Rust
//@ run-pass
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#![feature(core_intrinsics)]
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#![feature(const_heap)]
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use std::intrinsics;
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const _X: () = unsafe {
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let ptr = intrinsics::const_allocate(4, 4);
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intrinsics::const_deallocate(ptr, 4, 4);
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};
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const Y: &u32 = unsafe {
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let ptr = intrinsics::const_allocate(4, 4) as *mut u32;
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*ptr = 42;
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&*ptr
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};
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const Z: &u32 = &42;
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const _Z: () = unsafe {
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let ptr1 = Y as *const _ as *mut u8;
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intrinsics::const_deallocate(ptr1, 4, 4); // nop
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intrinsics::const_deallocate(ptr1, 2, 4); // nop
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intrinsics::const_deallocate(ptr1, 4, 2); // nop
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let ptr2 = Z as *const _ as *mut u8;
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intrinsics::const_deallocate(ptr2, 4, 4); // nop
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intrinsics::const_deallocate(ptr2, 2, 4); // nop
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intrinsics::const_deallocate(ptr2, 4, 2); // nop
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};
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fn main() {
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assert_eq!(*Y, 42);
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assert_eq!(*Z, 42);
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}
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